Hello. I wonder why every (or sorry if I am missing any of them) agent have their reusable (cool down) abilities but brimstone? One of his abilities must be reusable. Such as Molly or smoke

If the enemy is super far away and I have a Vandal or the Phantom, I always ads. I know it's not mandatory to do so in that situation, but it's super hard for me as I don't trust myself to not ads on a far away target. Of course I hip-fire...